阿摩線上測驗
登入
首頁
>
研究所、轉學考(插大)◆電磁學
>
91年 - 91 淡江大學 轉學考 電磁學#56129
>
題組內容
4. A circular loop of radius R, carries a steady current I.
(b) Find the magnetic moment of the loop. (5%)
其他申論題
(a) What is the force on a point charge Q at (a, 0, 0) (Cartesian coordinates)? (6%)
#213232
(b) What is the force on Q at (0, 0, a)? (6%)
#213233
(c) How much work does it take to move Q from (a, 0,0) to (0,0, a)? (6%)
#213234
(a) Find the magnetic field a distance z above the center of the loop. (10%)
#213235
(a) Find the magnetic Field of the solenoid. (5%)
#213237
(b) Find the self-inductance per unit length of the solenoid. (5%)
#213238
(c) Find the energy stored in a section of length 1 of the solenoid. (5%)
#213239
6. At the interface between one linear magnetic material and another magnetic field lines bend (see Fig. 3). Show that tanθ2 / tanθ1 = μ2/μ1 assuming there is no free current at the boundary. (12%)
#213240
(a) Find the electric field at a point p along its axis at a distance d from one end as shown in Fig. 1. (15 %)
#213241
(b) At large distances from the rod (that is, where d>>L), what is the field of the rod? Give some discussion on your results. (5%)
#213242